nshkmod | Network Service Header Linux kernel module implementation

nshkmod is a C library. nshkmod has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

An entry point for a path is an nsh interface. When xmit a packet to an nsh interface, the packet is encapsulated into NSH headers (base and path (and context if needed) headers). NSH encapsulated packets go through look-up mapping table process. Look-up key of the table is service path index and service index, and values of entries are next hop IP address and encapsulation type or nsh interface. Received NSH packets from VXLAN newtorks are also processed in the same manner. Outer headers up to VXLAN are removed, checking service path index and service index, and received to an appropriate nsh interface in accordance with the mapping table. By abstracting NSH paths as pseudo interfaces that means struct net_device, existing Linux network stack and its various functions can be used for network service chaining (e.g, Linux bridge, openvswitch, openflow and IP routing, etc).